Document 896-1 Flyback Transformer For Linear Technology LT3799 Isolated LED Controller • Developed for Linear Technology for use with their LT3799 Isolated LED Controller with active power factor correction • Mounted on LT3799 Demo Board • Universal input; 24 Watt output • 3000 Vrms, one minute primary to secondary isolation; 500 Vrms, one minute primary to bias isolation Core material Ferrite Terminations RoHS compliant tin-silver over tin over copper. Other terminations available at additional cost. Weight 13.9 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°C. Tray packaging: –40°C to +80°C Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 100 per tray PCB washing Only pure water or alcohol recommended Part number InductanceInductance Leakage at 0 A1 min at Ipk2 DCR max inductance ±10% (µH) (µH) (Ohms) max (µH)3 JA4429-AL 400 340 0.252 (Pri) 0.126 (Sec) 0.149 (Bias) (A) Output4 1 : 0.24 1 : 0.24 1.3 24 V, 1.0 A Dot indicates pin 1 0.680 max 17,30 7 Pri 0.110 min 2,79 Sec 2 Ipk2 7.5 1. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc using an Agilent/ HP 4263B impedance analyzer or equivalent. 2. Peak primary current drawn at minimum input voltage. 3. Leakage inductance is for the primary and is measured with the secondary shorted. 4. Output is for the secondary. Bias winding output is 24 V, 20 mA. 5. Electrical specifications at 25°C. 1 Turns ratio Pri : Sec Pri : Bias 0.197 5,0 0.590 15,0 6 0.025 0,64 3 0.830 21,1 Bias 4 4 1 5 0.590 15,0 8 0.197 5,0 0.830 max 21,1 1 Dimensions are in 8 inches mm US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] 4 0.055 ∅ 1,4 5 Recommended PC Board Layout Document 896-1 Revised 11/11/10 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.